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s t e e h S 3 D... d. d o M o /N\ No. 480,871. Patented Aug. 16, 1892-.l

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D. O. JAMES. PIPE THREADING MACHINE.

No. 480,871. Patented Aug. 16, 1892:.

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D. 0. JAMES. PIPE THRBADING MACHINE. No. 480,871. Patented Aug. 16, 1892.

UNITED STATES PATENT Orti-CE.

DAVID O. JAMES, OF CHICAGO, ILLINOIS, ASSIGNOR, BY DIRECT AND MESNE ASSIGNMENTS, TO HIMSELF AND JOHN' GRANT, OF SAME PLACE.

PIPE-TH READING MACHINE.

SPECIFICATION forming part of Letters Patent No. 480,87' 1, dated August 16, 1892.

Application led November 10, 1891. Serial No. 411,499. (No model.)

To @ZZ whom t may concern: Be it known that I, DAVID O. JAMES, of Chicago, in the county of Cook and State of Illinois, have invented certain new and useful Improvements in Pipe- Threading l Machines; and I do hereby declare that the following is a full, clear, and exact description thereof, reference being had to the accompanying drawings, and to the letters of refer- Io ence marked thereon, which form a part of this specification.

Thisinvention relates to devices for threading pipes, and has for its object to provide a portable mechanism adapted to operate on pipes of different sizes.

The invention consists inthe matters to be described in the following specification, and pointed out in the appended claims.

In the accompanying drawings, Figure l is zo side elevation of a pipe-threading machine embodying my improvements. Fig. 2 is a plan view of the same Fig. 3 is a longitudinal horizontal section of the same on the line 3 3 of Fig. 4:. Fig. 4 is a vertical transverse section' on line 4 i of Fig. 2. Fig. 5 is a detail section showing the rear face of the diestock holder. Fig. 6 isaside elevationthereof. Fig. 7 is a detail of a removable cam-track. Fig. 8 is a detail illustrating a modification 3o of one of the parts. Fig. 9 is a vertical transverse section through the pipe-clamp standard.

The operative parts of the machine are supported in aframe comprisinga base A, adapted tobesecuredtoabenchortable,andtwostand ards B and C, one of which C is preferably cast integral with the base A,while the other' standard B is cast separately from said base and secured thereon opposite the standard C by 4o a screw bolt or bolts h. This removable standard B is provided with a vertical recess B', in which is arranged any usual or preferred form of pipe clamp or vise-as, for instance, that indicated in the drawings, consisting of upper and lower jaws b and b2, adapted to move in guides formed by the sides of the said recess B', and operated by vertical shafts b3 b3, each provided with'a right and a left hand thread to engagecorrespondingly-tapped 5o lugs b4, projecting from the opposite Vsides pinions h5 b5, which mesh with an intermediate pinion h6, rigidly secured to a handle or le- 5 5 ver bi, j ournaled on a stout post bs, which projects from the top of the standard B midway between the upwardly-projecting ends of the screw-shafts b3 b3. From this construction it will be seen that the movement of the handle 67 and rotation of its pinion b@ will cause the simultaneous rotation of the pinions b5 b5 and their shafts b3 b3, thus moving the upper and lower jaws b and b2 an equal distance in opposite directions.

The iiXed standard C is provided at its upper end with a hollow boss C', formingahorizontal bearing, in which is journaled a sleeve D, provided at its inner end or that adjacent to the pipe-clamp with a gear-wheel d, which 7o may consist of teeth formed in the periphery of said sleeve.

Within the sleeve D is journaled a second sleeve E, the inner end of which is provided with a iiange c, and to the face ot' this fiange 75 c a die-stock F is secured by bolts f, passing through said die-stock and into said flange. The die-stock F is in the form of a disk, having a peripheral iiange f', which overhangs the iiange e of the sleeve E, and is provided 8o exteriorly with gear-teeth f 2. These sleeves, with their accompanying parts, are designed to be bodily moved or advanced toward the pipe -clamp in the operation of cutting a thread. 8 5

Arms B2 and C2 project horizontally from one side of the standards B and C, and are provided at their outer ends with bearings, in which the ends g g of an eccentric-shaft G are seated. The eccentric of this shaft G is 9o of a length to extend from the arm B2 of the standard B to the arm C2 of standard C, and upon this eccentric is journaled a hub I-I, adapted to slide horizontally on the eccentric and provided with a gear-wheel h, adapted to mesh with the pinion d, formed at the end of the sleeve D, and provided, also, with a pinion 7L', adapted to mesh with the gear f2, formed in the iiange f of the die-stock F. The forward end of the gear h terminates in roo with the gear f2 of die-stock F, which is car-A ried by and moves with sleeve E. The opposite movement of the eccentric-shaft G disconnects the train of gearing between the sleeves D and E, so that each of said sleeves may be rotated independently of the other. The shaft G is extended at one end gto project beyond its bearing in the arm C2, and to said projecting end of the shaft a handle G is secured, by means of which the shaft may be rocked in its bearings to shift the eccentric, whereby the gear-wheel h and pinion h of the hub H are thrown into or out of mesh with the pinion d and gear-wheelf2- The inner end of the handle G is provided with a curved recess g3 to receive a stop-pin c2, projecting from the sides of arm C2, the handle being so adjusted upon the end of shaft G that the ends of the recess will abut against the pin c2 at the opposite extremes of the throw of the eccentric, thus affording a stop to prevent the rocking ot' the eccentric-shaft past the points where the gears h and h', carried thereby, are in mesh or out of mesh with the gears of the sleeves D and E. The inner revoluble sleeve E is of greater length than the outer revoluble sleeve D, within which it is journaled, and the outer end of said sleeve E projects a considerable distance beyond the outerend of the sleeve D and has rigidly secured upon its extreme end a removable clutch-faced ornotched ring E', adapted to engage one side of a notched clutch-collar I, loosely mounted on said sleeve E. Said clutch'collar is provided with a setscrew t', by means of which it may be locked upon said sleeve E in engagement with said clutch-ring E', the sleeve E being to this end provided with an annular groove e to receive the end of said set-screw v1. member D is also formed in the outer end of the sleeve D by notching the same or otherwise to engage the opposite or inner side of the clutch-collar I, whereby either one of the sleeves D or E may be rotated by said clutchsleeve in either direction by application of power to the hand-levers I thereof when the sleeve is shifted to engage one or the otherof the clutch members E or D'. 'lo prevent longitudinal movementof the sleeves Dand E with respect to each other, the inner sleeve E is provided with a peripheral groove d', which engages the inner end of a screw d2, seated in a tapped hole in the outer sleeve D.

The die-stock F is provided centrally with a rectangular recess F to receive a correspondingly-shaped screw-cutting die, (indi- A clutch face or n cated by dotted lines in Figs. 3 and 4,) and a keeper-plate F2 is pivoted at one of its sides on a stud f3, projecting from the face of the die-stock adjacent to the recess F, and provided at its opposite side with a hook or notch f4 to engage a thumb-screw f5, entering the die-stock at the opposite side of the recess from stud f3, said thumb-screw serving to clamp the keeper-plate F2 securely in place over the recess F and against the face of adie seated therein. lThe keeper-plate F2 is provided with a central opening f6 of sufficient diameter to admit of the free passage of the pipe .I to be threaded.

The face of the flange e of sleeve E opposite the die-stock F is provided with two concentric cam-tracks e2 and e3, rising in opposite directions from a common level, which operate, in conjunction with friction-rollers E2 and E3, to give a lead to the die in starting the thread. The roller E2 is carried by a fixed stud e4, secured to the standard C, and travels on the inner cam-track e2, which gradually increases in height from right to left, the conjoint operation of the roller and cam-track being to advance the inner sleeve E, with its die stock and die, the distance of one thread in a complete revolution of said sleeve E when rotated from left to right in cutting a right-hand screw-thread. The roller E3 is journaled on a stud e5, projecting from an arm es, pivoted on the standard C, the arm e6 being of such length that when moved on its pivot to a position parallel with the longitudinal axis of the revoluble sleeves the roller E3 will project beyond the roller E2 the distance of one thread, or, in other words, a distance equal to the height of the inner cam-track e2. This roller E3, when properly adjusted, travels on the outer camtrack e3, which gradually increases in height from left to right, the conjoint operation of this roller and cam-track being to cause the positive advance of the inner sleeve E, with its die-stock and die, independently of the natural draft of the die, so that if the camtrack e3 extends completely around the flange e the die would be advanced a distance of one thread in a complete revolution of said sleeve E when rotated from right to left in cutting a left-hand screw-thread. In the machine illustrated these cam tracks are arranged side by side and extend completely around the ilange e, less the length of the straight or fiat part e8 thereof, thus forcing the die forward positively until the cutting of one thread is nearly completed; but it will be understood that I do not confine myself to the use of camtracks of such length, nor to the particular arrangement thereof illustrated, as they may be of the same radius and extend but part way around the iiange e, their highest points meeting opposite the straight part e8 of the ange. 'lhisarrangement would provide for the positive advancement of the die during the cutting of a little less than half of one thread, and the adjustable roller E3 could be dispensed with. The roller E3 is retained in IOC IIO

position during this operation by contact' of its arm e against an abutment or stop c7, projecting from the standard C; but upon reversing the movement of the die-stock and its accompanying parts the arm e6 will swing on its pivot, thus moving the roller E3 out of operative posit-ion.

As illustrated, the cam-tracks c2 and e3 form a part of the flange e of the sleeve E but it will be understood that thesecam-tracks may be formed on a separate ring of metal, which may be secured to said flange e in any approved manner, and in some instances such a construction is preferable, as it provides for the employment of cam-rings of different pitch, thus admitting of cutting a greater or less number of threads to the inch.

To insure the engagement of a die with the pipe to be threaded at the commencement of the operation, the cam-tracks at their lower or depressed ends join the level of the iiange e at a greater or more abrupt angle, as indicated at e9, than the angle of the thread to be cut, so that a roller E2 or E3, traveling upon this abrupt angle c", will force the die upon the end ot the pipe, thus compensating for a slight degree of lost motion in the parts, which cannot well be avoided, owing to the difculty of clamping the end of the pipe to be threaded tightly againstthe end of the die. In threading pipes of small diameter or of a material that is easily cut by the die the clutch-collar is adj usted vto interlock With the clutch-ring E', and the eccentric-shaft is turned to disconnect the gears h h from the gears d and f2, thus leaving the inner sleeve E, which carries the die-stock F, free to rotate independently of the sleeve D, Within Which it is journaled; but in operating on pipes of large diameter or hard meterial power is ap-v plied to the outer sleeve D by adjusting the clutch-collar I to engage With the clutch member d', formed in the end of said sleeve D, and the eccentric-shaft G is rocked to cause the engagement of the respective gears, thus causing the inner sleeve E and its die to ro-v tate at a slower speed, but with a relative in-A crease of power.

The machine illustrated is designed to operate upon pipes varying from one-eighth to two inches 1n diameter, the various dies being interchangable.

As in the operation of threading pipes the tendency of the workman is to press forward on the hand-levers of the clutch-sleeve, I therefore prefer to provide a means, as 'the groove and set-screw, byl which the clutchcollar may be locked in engagement with the In Figs. l and 2 of the drawings I have showed two separate rollers E2 and E3, each designed to be used in conjunction with but one of the concentric cam-tracks e2 and e3,- but it will be understood that the same end may be attained by the use of a single roll, as E2, adapted to be adjusted opposite either one of said concentric cam-tracks in any one of many ways-as, for instance, referring to Fig. 8, one side of the tubular boss C of the standard C vmay be provided with two sockets c and c', arranged at different distances from the center of said boss and each designed to receive the stem of the stud c4, in which the roller F.2 is journaled.

What I claim is- 1. A pipe-threading machine comprising a pipeclamp, a revoluble sleeve supported opposite said clamp and carrying a die-stock, a

cam-track secured to said sleeve, and a roller arranged to travel upon said cam-track, substantially as described.

2. A pipe-threading machine comprising a pipe-clamp, a revoluble sleeve supported opposite said clamp and carrying a die-stock, two oppositely-arranged cam-tracks secured to said sleeve, and a roller arranged to travel upon each of saidV cam-tracks, substantially as described.

3. A pipe-threading machine comprising a pipe-clamp, a revoluble sleeve supported opposite said clamp and carrying a die-stock, two oppositely-arranged cam-tracks secured to said sleeve, a fixed roll arrangedto travel upon yone of said cam-tracks, and an adjustable roll adapted to be projected beyond vthe Yfixed roll and travel upon the other cam-track, substantially as described.

4.. A pipe-threading machine comprising a pipe-clamp, two revoluble sleeves supported one within the other opposite said clamp and leach provided at its inner end with a gear, a shaft arranged parallel with said sleeves and having Vthereon a hub provided with gears adapted to mesh with the gears of said sleeves, and a die-stock secured to the inner sleeve opposite the pipe-clamp, substantially as described.

5. A pipe-,threading machine comprising a pipe-clamp, two revoluble sleeves supported one within the other opposite said clamp and each provided at its inner end with a gear, a laterally-movable shaft arranged parallel with said sleeves and having 'thereon a hub provided with gears adapted to mesh with the gears of said sleeves, and a die-stock secured to the inner sleeve opposite the pipeclamp substantially as described.

6. A pipe-threading machine comprising a pipe-clamp, two revoluble sleeves supported one within the other opposite said clamp and each provided at itsinner end with a gear, a laterally-movable shaft arranged parallelwith said sleeves and having thereon a hub provided With gears adapted to mesh with the gears of the said sleeves, an adjustable clutchcollar mounted on the inner sleeve, clutch IOO IIO

members carried by each of 'said sleeves, a die-stock secured to the inner sleeve opposite the pipe-clamp, and means for adjusting the shaft, substantially as described.

7. A pipe-threading machine embodyingtwo standards, one of which is provided with a pipe-clamp, a sleeve journaled in the other standard and provided at its inner and outer ends with a gear and clutch member, respectively, another sleeve of greater length journaled Within the rst-named sleeve and provided at its inner end with a die-stock having a peripheral gear and at its outer end with a clutch member, a clutch-collar mounted on the outer end of the inner sleeve, a laterallyadjustable shaft journaled in arms projecting from the standards, a hub on said shaft provided with gears adapted to mesh with the gears of the sleeves, and a means for adjusting the shaft, substantially as described.

8. A pipe-threading machine comprising a l pipe-clamp, two revoluble sleeves supported one within the other opposite said clamp and each provided at its inner end with a gear, a laterally-adjustable shaft arranged parallel with said sleeves and having thereon a hub provided with gears adapted to mesh with the gears of the sleeves, clutch members carried by each of said sleeves, a clutch-collarmount ed on the inner sleeve between the clutch members, a die-stock secured to the inner sleeve opposite the pipe-clamp, and means for advancing the inner sleeve toward the pipe-clamp as said sleeve is rotated, substantially as described.

In testimony that I claim the foregoing as my invention Iafx my signature in presence of two witnesses.

DAVID O. JAMES. Witnesses:

IRVINE MILLER, C. A. NEALE. 

